[Bug bootstrap/40504] New: Configure make a makefile, despite saying: "mpfr.h... buggy but acceptable"

[david dot kirkby at onetel dot net]

I doubt the following configure options were optimal, as I'd simuply cut/hasted
from another machine. However, what I find odd is that the configure script
determined says "

checking how to compare bootstrapped objects... cmp $$f1 $$f2 16 16
checking for correct version of gmp.h... yes
checking for correct version of mpfr.h... buggy but acceptable


Given the configure script has determined that mpfr.h is buggy, it should at
least 

1) Exit, with an error
2) Print a message such as "This will not be used, mpfr.h from gcc will be used
instead'

Simply to report something is buggy and unaccesptable, then continue as nothing
had happened seems unwise. 

 ../gcc-4.4.0/configure --without-gnu-as --with-as=/usr/ccs/bin/as
--without-gnu-ld --with-ld=/usr/ccs/bin/ld
--with-gmp=/home/kirkby/dependencies/ --with-mpfr=/home/kirkby/dependencies/
--enable-languages=c,c++,fortran --prefix=/home/kirkby/gcc-4.4.0-Sun-Tools/
--with-pkgversion=Built-un-kestrel


The veriosn of gcc used to build attempt to build gcc 4.4.0 was an earlier one.
The configur options to that are:

Target: sparc-sun-solaris2.10
Configured with: ../gcc-4.3.2/configure
--prefix=/home/mabshoff/sparc-solaris-toolchain/
--enable-languages=c,c++,fortran --with-gnu-ld
--with-ld=/home/mabshoff/sparc-solaris-toolchain/bin/ld --with-gnu-as
--with-as=/home/mabshoff/sparc-solaris-toolchain/bin/as
--with-gmp=/usr/local/gmp-4.2.3/sparc-SunOS-gcc-4.3.1-abi32/
--with-mpfr=/usr/local/mpfr-2.3.2/sparc-SunOS-gmp-4.2.3-gcc-4.3.1-abi32/
Thread model: posix
gcc version 4.3.2 (GCC)


But basically, it seems irrelavant what options are compiler are used. If gcc
determines something is unacceptable, it should not continue, and produce a
makefile that at least starts compiling. I did not see if it actually ever
built gcc - that would have been a bit stupid given the error message.


-- 
           Summary: Configure make a makefile, despite saying: "mpfr.h...
                    buggy but acceptable"
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: david dot kirkby at onetel dot net
 GCC build triplet: SunOS kestrel 5.10 Generic_139555-08 sun4u sparc
                    SUNW,Sun-Blade-
  GCC host triplet: SunOS kestrel 5.10 Generic_139555-08 sun4u sparc
                    SUNW,Sun-Blade-
GCC target triplet: SunOS kestrel 5.10 Generic_139555-08 sun4u sparc
                    SUNW,Sun-Blade-


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40504